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IntermediateMuscle Building

Lean Bulk: 12-Week Muscle Building Program

Build muscle with minimal fat gain. Training and nutrition structured for a clean gaining phase.

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Duration
12 weeks
Level
Intermediate
Equipment
Gym
Goal
Lean Muscle Gain
Lean Bulk: 12-Week Muscle Building Program

Overview

A lean bulk is a controlled calorie surplus designed to maximize muscle gain while minimizing fat gain. The training program uses an upper/lower split with enough volume to drive growth, and the nutrition guidelines keep you in a modest surplus.

This is not a see-food diet. You will track calories, prioritize protein, and accept that gaining muscle slowly is better than getting fat quickly.

Diagram illustrating key concepts from Lean Bulk: 12-Week Muscle Building Program
Lean Bulk: 12-Week Muscle Building Program — visual breakdown

Schedule

  • •Monday: Upper Body A (Strength)
  • •Tuesday: Lower Body A (Strength)
  • •Wednesday: Rest
  • •Thursday: Upper Body B (Hypertrophy)
  • •Friday: Lower Body B (Hypertrophy)
  • •Saturday: Optional Weak Point Day
  • •Sunday: Rest

Upper Body A (Strength)

  • •Barbell Bench Press: 4x5 (2min rest)
  • •Barbell Row: 4x6 (2min rest)
  • •Overhead Press: 3x6 (90s rest)
  • •Weighted Pull-Ups: 3x6 (90s rest)
  • •Barbell Curl: 2x8 (45s rest)
  • •Close-Grip Bench Press: 2x8 (45s rest)

Lower Body A (Strength)

  • •Barbell Back Squat: 4x5 (2-3min rest)
  • •Romanian Deadlift: 4x6 (2min rest)
  • •Front Squat: 3x8 (90s rest)
  • •Leg Curl: 3x10 (60s rest)
  • •Standing Calf Raise: 4x12 (45s rest)

Upper Body B (Hypertrophy)

  • •Incline Dumbbell Press: 4x10 (90s rest)
  • •Cable Row: 4x12 (60s rest)
  • •Dumbbell Shoulder Press: 3x12 (60s rest)
  • •Lat Pulldown: 3x12 (60s rest)
  • •Lateral Raise: 4x15 (30s rest)
  • •Incline Dumbbell Curl: 3x12 (45s rest)
  • •Overhead Tricep Extension: 3x12 (45s rest)

Lower Body B (Hypertrophy)

  • •Leg Press: 4x12 (90s rest)
  • •Dumbbell Romanian Deadlift: 3x12 (60s rest)
  • •Bulgarian Split Squat: 3x10 per leg (60s rest)
  • •Leg Extension: 3x15 (45s rest)
  • •Seated Calf Raise: 4x15 (30s rest)

Optional Weak Point Day (Saturday)

Pick 2-3 body parts that need extra work:

  • •3-4 exercises, 3 sets each, moderate weight, focus on contraction
  • •Keep total time under 30 minutes
  • •This is bonus work, not another hard session

Nutrition Guidelines

  • •Calorie surplus: 200-300 calories above maintenance. Not more.
  • •Protein: 1.8-2.2g per kg bodyweight per day
  • •Carbs: 3-5g per kg bodyweight (prioritize around training)
  • •Fat: 0.8-1.0g per kg bodyweight
  • •Track your weight weekly: aim to gain 0.25-0.5kg per week. If gaining faster, reduce calories by 100-150.

Monitoring Progress

  • •Weigh yourself daily, use the weekly average
  • •Take progress photos every 2 weeks (same lighting, same time of day)
  • •Track your main lifts. If strength is going up, muscle is being built.
  • •If the scale is not moving after 2 weeks, add 150 calories per day

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Frequently Asked Questions

What should I know about overview?
A lean bulk is a controlled calorie surplus designed to maximize muscle gain while minimizing fat gain. The training program uses an upper/lower split with enough volume to drive growth, and the nutrition guidelines keep you in a modest surplus.
What should I know about optional weak point day (saturday)?
Pick 2-3 body parts that need extra work: